Finding the Fourth Proportional to 1,522.30, 2,100.78 and 859.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,522.30 : 2,100.78 = 859.09 : x
2. Step 2: Convert to fraction form
   1,522.30/2,100.78 = 859.09/x
3. Step 3: Cross multiply
   1,522.30x = 2,100.78 × 859.09
4. Step 4: Simplify right side
   1,522.30x = 1,804,759.09
5. Step 5: Solve for x
   x = 1,804,759.09/1,522.30
6. Step 6: Final answer
   x = 1,185.55